SSM框架整合

1、dao層

  • applicationContext-mapper.xmlhtml

    配置數據源、sqlSessionFactory以及掃描dao層包。前端

    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
    	<!-- 數據庫鏈接池 -->
    	<!-- 加載配置文件 -->
    	<context:property-placeholder location="classpath:properties/*.properties" />
    	<!-- 數據庫鏈接池 -->
    	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
    		destroy-method="close">
    		<property name="url" value="${jdbc.url}" />
    		<property name="username" value="${jdbc.username}" />
    		<property name="password" value="${jdbc.password}" />
    		<property name="driverClassName" value="${jdbc.driver}" />
    		<property name="maxActive" value="10" />
    		<property name="minIdle" value="5" />
    	</bean>
    	<!-- 讓spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
    	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    		<!-- 數據庫鏈接池 -->
    		<property name="dataSource" ref="dataSource" />
    		<!-- 加載mybatis的全局配置文件 -->
    		<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
    	</bean>
    	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    		<property name="basePackage" value="com.taotao.mapper" />
    	</bean>
    </beans>
    複製代碼

2、Service層

  • applicationContext-service.xmljava

    掃描service層的全部包。mysql

    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
    		<context:component-scan base-package="com.taotao.service"/>
    </beans>
    複製代碼
  • applicationContext-trans.xmlgit

    配置事務管理。github

    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
    	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    	<!-- 事務管理器 -->
    	<bean id="transactionManager"
    		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    		<!-- 數據源 -->
    		<property name="dataSource" ref="dataSource" />
    	</bean>
    	<!-- 通知 -->
    	<tx:advice id="txAdvice" transaction-manager="transactionManager">
    		<tx:attributes>
    			<!-- 傳播行爲 -->
    			<tx:method name="save*" propagation="REQUIRED" />
    			<tx:method name="insert*" propagation="REQUIRED" />
    			<tx:method name="add*" propagation="REQUIRED" />
    			<tx:method name="create*" propagation="REQUIRED" />
    			<tx:method name="delete*" propagation="REQUIRED" />
    			<tx:method name="update*" propagation="REQUIRED" />
    			<tx:method name="find*" propagation="SUPPORTS" read-only="true" />
    			<tx:method name="select*" propagation="SUPPORTS" read-only="true" />
    			<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
    		</tx:attributes>
    	</tx:advice>
    	<!-- 切面 -->
    	<aop:config>
    		<aop:advisor advice-ref="txAdvice"
    			pointcut="execution(* com.taotao.service.*.*(..))" />
    	</aop:config>
    </beans>
    複製代碼

3、表現層整合

  • springmvc.xml
    • 註解驅動
    • 掃描controller
    • 配置前段視圖解析器
    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    	xmlns:context="http://www.springframework.org/schema/context"
    	xmlns:mvc="http://www.springframework.org/schema/mvc"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
    	<context:component-scan base-package="com.taotao.controller" />
    	<mvc:annotation-driven />
    	<bean
    		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    		<property name="prefix" value="/WEB-INF/jsp/" />
    		<property name="suffix" value=".jsp" />
    	</bean>
    </beans>
    複製代碼

4、web.xml文件配置

  • 加載spring容器
  • 解決post亂碼
  • springmvc的前端控制器
    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    	id="WebApp_ID" version="2.5">
    	<display-name>taotao-manager-web</display-name>
    	<welcome-file-list>
    		<welcome-file>login.html</welcome-file>
    	</welcome-file-list>
    	<!-- 加載spring容器 -->
    	<context-param>
    		<param-name>contextConfigLocation</param-name>
    		<param-value>classpath:spring/applicationContext*.xml</param-value>
    	</context-param>
    	<listener>
    		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    	</listener>
    
    	<!-- 解決post亂碼 -->
    	<filter>
    		<filter-name>CharacterEncodingFilter</filter-name>
    		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    		<init-param>
    			<param-name>encoding</param-name>
    			<param-value>utf-8</param-value>
    		</init-param>
    		<!-- <init-param>
    			<param-name>forceEncoding</param-name>
    			<param-value>true</param-value>
    		</init-param> -->
    	</filter>
    	<filter-mapping>
    		<filter-name>CharacterEncodingFilter</filter-name>
    		<url-pattern>/*</url-pattern>
    	</filter-mapping>
    
    
    	<!-- springmvc的前端控制器 -->
    	<servlet>
    		<servlet-name>taotao-manager</servlet-name>
    		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    		<!-- contextConfigLocation不是必須的, 若是不配置contextConfigLocation, springmvc的配置文件默認在:WEB-INF/servlet的name+"-servlet.xml" -->
    		<init-param>
    			<param-name>contextConfigLocation</param-name>
    			<param-value>classpath:spring/springmvc.xml</param-value>
    		</init-param>
    		<load-on-startup>1</load-on-startup>
    	</servlet>
    	<servlet-mapping>
    		<servlet-name>taotao-manager</servlet-name>
    		<url-pattern>/</url-pattern>
    	</servlet-mapping>
    </web-app>
    複製代碼

5、使用Mybatis逆向工程生成的mapper和pojo使用方法

  • 先建立一個pojo對應的example對象。
    TbItemExample example = new TbItemExample();
    複製代碼
  • 再生成一個Criteria對象。
    Criteria criteria = example.createCriteria();
    複製代碼
  • 添加查詢條件
    criteria.andIdEqualTo(id);
    複製代碼
  • 調用mapper方法查詢
    List<TbItem> list = itemMapper.selectByExample(example);
    複製代碼

6、Mybatis分頁插件的使用

  • 導入jar
  • Mybatis的配置文件中配置分頁插件
    <plugins>
    	<plugin interceptor="com.github.pagehelper.PageHelper">
    		<!-- 設置數據庫類型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六種數據庫-->        
        	<property name="dialect" value="mysql"/>
    	</plugin>
    </plugins>
    複製代碼
  • 在查詢中使用
    TbItemExample example = new TbItemExample();
    //只需在查詢以前加一行這個代碼便可
    PageHelper.startPage(page, rows);
    List<TbItem> list = itemMapper.selectByExample(example);
    //建立一個返回值對象
    EUDataGridResult result = new EUDataGridResult();
    result.setRows(list);
    //獲取記錄總條數
    PageInfo<TbItem> info = new PageInfo<>(list);
    result.setTotal(info.getTotal());
    複製代碼
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